Hydraulic-motor valve



(No Model.) H. W'. FORSL-AND.

l HYD'RAULIG MOTOR VALVE. No. 417.716. 'Patented Deo. 24, 1889.

UNITED STATESl PATENT OFFICE.

HUGO IN.v FORSLAND, OF CHICAGO, ILLINOIS.

HYDRAULIC-MOTOR VALVE.

SPECIFICATION forming part of Letters Patent No. 417,716, dated December 24, 1889. Application iiled March 18, 1889. Serial No. 303,749. (No model.)

To all whom t may concern:

Be it known that I, HUGO W. FORsLAND, a citizen of the United States, and a resident of .the city of Chicago, county of Cook, and State with a stop device which will automatically secure absolute certainty of action of the main valve.` v

In the accompanying drawings, which are made a part of this specification, Figure l represents a longitudinal sectional view,

partly in elevation, of the main valve of a lhydraulic motor, of the piston by means of which it is operated, and of the auxiliaryV valve controlling the actuating-piston, to-

' gether with the device for operating the auX- iliary valve.

Figs. 2 and 3 show details of the device for controlling the action of the auxiliary valve.

I have not deemed it necessary to 'show either the hydraulic motor or the means of connecting thel valve device with the elevator-carriage when used in connection with -an elevator, as neither of them come within ldraulic motor.

The cylinder J is open at its outer end for the purpose of permitting the discharge of the .waste water.

The drawin gs represent the valve H as beding upon the center-that is, both the inducv tion and eduction being cut off and the motor being stationary. If the valve H is moved toward the outer end of the cylinder J, the disk h ceases to out oft connection between the ports N and M, and full connection is established between said ports when the-disks h, h', and h2 reach the points indicated, respectively, by j js 3'4. The motion of the motor is reversed by moving the valve H to the inner end of the cylinder J, so that the disks h h2 reach the points, respectively, f2 j5. The movement of the valve H is secured by the operation of thepiston G within the cylinder K, which is actuated by water admitted through the channels O and o', said channels serving alternately-for the purposes of induction and eduction, and for the latter purpose communicating with the waste-chamber P through the channels p 19";

The auxiliary valve consists of the cylinder L, connected at each end with the corresponding ends of the cylinder K by channels O and of. Within the cylinder L is fitted a packed and balanced piston-valve A, consisting of two disks exactly thesame distance apart as the channels O and o', carried upon a stein d2. Between the disks of the valve A is the service-pipe R. In any suitable position, as P, is located a discharge-chamber connected with 'each end of the cylinder L by suitable channels p and p.

With the valveAin the position as shown, all communication between the cylinder K and the service-pipe R and discharge-chamber P is cut oit, and the piston G and valve H are necessarily stationary. When the valve A is moved to the position indicated by a', pressure is communicated to the piston G through the channel O, and the corresponding channel O serves as a discharge-pipe,

.and the main valve H is moved so that h2 reaches the position indicated by j5. When the valve A is carried to the position indicated by a, the movement of the piston G is reversed. The outer end of the valve-stem a2 is provided with a grooved collar @which receives the studs 1 and 2 upon the yoke 3 of Q the bell-crank B. (Shown in Fig. 2.) This bell-crank is pivoted, as shown by dotted lines at u, to the standard E, which is firmly attached to the end of the cylinder K. The second arm of the bell-crank B is slotted to ICO receive the sliding bar l), which is connected by a pivot-joint to the rod D, by which the device is controlled by the operator.

The cam C, adjusted at an oblique angle to the bar l), slides upon the arm c of the standard E, being carried by the sliding guide c, of which it forms an integral part. This cam C receives the roller b,which is carried upon the pin, pivotally uniting the bar l) and the rod D, and thereby actuates the bell-crank B and the valve A when the rod D is withdrawn or receives an inthrust. The guide c is secured to the lever F, so as to slide freely in the slot f2, the lever E being pivoted at one end to the arm e of the standard E and connected at the other end with the valvestem I by means of the yoke C, carrying the studs et 5, which slide within the groove of the collar 1'.

The drawings represent the entire valve scheme in posit-ion to bring the motor to a stop. \Vhen applied to an elevator, should it be desired to raise the cab the bar l1 is forced into the bell-crank B, and by this movement the roller D is carried to the end of the cam C to the point indicated by 114, the bellcrank B being correspondingly moved, so as to draw out the valve-stem a2, thus bringing the valve A to the position shown at a.

The piston G is carried to the position indicated by g, and thc valve 1I is correspondingly moved, connection being thus opened between the ports N and M. As the piston G moves toward g the collar 'i is carried toward the position indicated by moving the lever F with it, whereby the cam C is carried toward the position indicated by c2. This movement of t-he cam necessarily brings the roller 7J back to the center of the cam, asindicated by b5, thus restoring the bell-crank to the position as shown in the drawings, and bringing-the auxiliary valve A to the center, as shown, shutting ott both the induction to and eduction from the cylinder K, holding the piston G securely at g and maintaining the pressure through the ports N and )I until the operator again moves the auxiliary valve by means of the rod D.

When the elevator is ascending and the cam C is in the position marked c2, if the bar D be raised to stop the movement of the elevator the roller b will be carried to Aa point U in the position C2of the cam C; and,likewise, if the cam C is in position c and the elevator descending' the movement of the bar D will carry the roller b to a point If in the po-` sition c of the cam.

The elevator is stopped by withdrawing the rod D, so as to carry the roller o to the position indicated by U. This movement by the action of the bell-crank B moves the valve A to the position indicated by a', and the piston G is carried toward the line g. lVhen it has reached the position as shown in the drawings, the action of the cam will have restored the valve A to the position as shown, and the movement is stopped. The elevator is lowered by again withdrawing the rod D, so as to force the roller b to the point b2, by which action the piston G is carried on toward the line g', and when it reaches that point the cam C will have been carried to the position indicated by c', the roller D to the point marked b3, bringing the valve A again to the center, securely holding the piston G at g and continuing the port M in connection with the open end of the cylinder J. The elevator is again brought to a stop by driving in the bar b until the roller b reaches the point indicated by 117, so that the valveA is brought to the position a, and the piston G and valve H are moved to the position as shown in the drawings, when the valve A will have been returned to its center, as shown.

It will be seen that by the automatic action of my device the auxiliary valve is invariably returned to its central position after every movement of the loperating-rod D, and the operator can at will attain either the maximum speed of the motor or any less degree of speed he may desire, and that the initial speed will be automatically maintained until further movement of the rod D by the operator.

l. In combination with the auxiliary valv of a hydraulic motor, an actuating bell-crank, a slide-bar carried by and longitudinally movable in the free or power-receiving arm of the bell-crank, and a cam set obliquely to the slide-bar and engaging it by means of a suitable stud and roller, whereby a lateral movement is imparted to said slide-bar, and thence to the arm of the bell-crank, when the slidebar is given a forward or backward thrust, substantially as described, and for the purpose set forth.

2. In combination with the auxiliary valve of a hydraulic motor, an actuating bell-crank, a slide-bar carried by and longitudinally movable in the free or power-receiving arm of the bell-crank, and a cam set obliquely to the slide-bar and engaging it by means of a suitable stud and roller and sliding upon a fixed standard in line of the direct thrust of the slide-bar, whereby a lateral movement is imparted to the said slide-bar and communicated to the arm of the bell-crank by the backward or forward movement of either the caln or the slide-bar, substantially as described, and for the purposes set forth.

3. In combination with the auxiliary valve of a hydraulic motor, an actuating bell-crank, a slide-bar carried by and longitudinally movable in the free or power-receiving arm of the bell-crank, a cam set obliquely to the slidebar and engaging it by any suitable means and sliding upon a fixed standard in line with the direct thrust of the slide-bar, whereby a lateral movement is imparted to the slide-bar and communicated to the arm of the bellcrank by the backward or forward movement of either the cam or the slide-bar, and a swing- IOO IIO

ing lever pivotally fnlerunied in a xed standard and engaging with and moved by the stem of the', main valve of the hydraulic motor, and

to said standard and its opposite end engaged in the collar 'L' of the valve-stem I; and the cam C, sliding upon the arm @and carried by the lever F and engaging, by a suitable pro- 15 -jecting pin, the slide-bar b, all substantially as described.

HUGO W. FORSLAND.

Witnesses:

FRANK G. WARD, JOHN C. WEBER. 

